FOR those worried by the Kremlin’s growing influence in Europe, Bulgaria has long been a prime suspect. As much as 90% of its gas comes from Russia. It is an ardent backer of South Stream, a Balkan gas pipeline that Russia is promoting in defiance of European Union rules on public procurement and energy liberalisation. A Russian presence in the murky worlds of Bulgarian banking and political-party finance has also aroused concern.This month the issue has come to a head. On June 3rd the EU flatly told Bulgaria to stop work on South Stream, a project also backed by the governments of Austria, Greece and Hungary. The Bulgarian government—a minority coalition of Socialists and a party of ethnic Turks—instantly refused. On the same day the EU temporarily cut tens of millions of euros in regional-development funds, the distribution of which has long been a bailiwick of the Turkish party, the Movement for Rights and Freedoms (DPS in Bulgarian). The EU has privately threatened to freeze more. This stoked a row inside the coalition between DPS and its Socialist (ex-communist) allies, South Stream’s strongest backers.On June 8th John McCain, an American…